Safety switch



Dec. 4, 1928. 1,693,952

. E. G. JOHANSSON SAFETY SWITCH Filed May 14,. 1926 2 Sheets-Sheet 1 E. G. JOHANSSON SAFETY SWITCH Filed May 14, 1926 2 Sheets-Sheet 2 ATTORNEYS. v

Patented Dec. 4 51928. r i f l v i {UNITED STATES PATENT oFFic Y MENTS TO THE PALMER ELECTRIC & MANUFACTURING, (30., OF WALTHAM, MASSA- CHUSETTS, A CORPORATION OF;MAS SACHUSETT S.- i

SAFETY swIToiLf Application fiied May 14, 1926. Serial No; 102030;-

My invention relates to improvements in fig. 3 is a detail view'onthe line 33 of safety switches having unitary bail and" Fig. 1; I v j handle switch actuating cranks and more Fig. 4 is aside elevation ofthe switch 55 particularly to the form of the crank and with the main and auxiliary covers" closed V the manner of mounting the same inthe 5 isa similar view with the auxiliary. casing. Heretofore such cranks have had cover open; 1 trunnions projecting from the bail in oppo- Fig. 6 is a detail" perspective View of the site directions and have been mounted so as internal bracket; to extend. through aperturesin both of two Fig. 7 is a detail perspective view of the opposing side walls, being provided with combined bearing plate and stop; and

oppositely extending bearing portions and, Fig.8 is a perspective view of the crank. at one end, with an integrallever handle. Referring more partlcularlyto the draw- This manner of mounting the craiikhandle ings, 2 is the casing of the switch. Mounted c5" is open to various objections, one of which therein is a switch mechanism 4' of any suitis that the'walls being flexible and the able construction, 1mm anactuating crank" crank being yielding either the wall or the composedof a bailG, having side arms 8 and crank is liable to be so bent that the far end 1 10 adjacent to the inner surfaces of 'thetwo of the cranl, namely the end" opposite the opposing walls of the switch, and an inte- 70 handle, slips from the wall opening forming gral lever handle 12. The portion of the.

its bearing. When this happens the switch crank between the side arm 8 and the lever can no longer b rl t d a d it handle 12 constitutes a trunnion orbearing is necessary for the service company to send portion supported within an aperture 14 an agent to inake repairs. Attempts have 1 Elder WHHS- is p 14 is been made to obviate this difiiculty by malc- Slightly elongated andis par ially C osed by 1 ingthe trunnion upon the end of the crank a earing plate 16 having a notch: 18

remote from the handle longer so that it partially embracing the bearing 'p01- 7 would be less liable to slip out of its socket tion of the crank and holding it .fiXed but this expedient has notbeen satisfac- Within and against one end of the slot I h case, th (gnd has t proj t 14. The lower end of the side arm 10 3o considerably beyond the outer surface of the is turned inward toward the handle 12, Casing d ha b a Soul-Ce f t bl shown at 20, andis supported bya bracket being liable to catch on various objects and 22 Sec red to the adjacent side 'wall by to tear the carton in which the switch is rirets 24, and having a portion spaced away 85 packed. from that side wall in which portion there The object of my invention is to do away is a perforation 26. The side arm 10 with th difficulti a d, in addition, t passes between this spaced away portion produce a handle which will brace the walls d h j n ide Wall and the inwardly .of the box'against either inward or outturned end 20 passes through the perfora- 1 ward movement, thus overcoming a stand- ,tion 26, the same being in alinement with the 40 ard manufacturing difficulty found inevery bearing portion at the other end of the manufacturers product where the walls are crank. The end of the crank remote from embraced and the far end of the handle the handle 12 is thus provided with a bear- 7 projects through a hole in the side wall. ing inside of the casing, as distinguished 95 The following is a description of an emfrom a bearingin the wall of the casing,

bodiment of my invention, reference be so that the far end is not exposed, and this ing had to the accompanying drawings in bearing is such that h th h dl i which: 7 once installed there is nodanger that it will Figure 1 shows the front'view of ,a safety slip out of place. This'is due tothe fact :00 switch embodying my invention with the that theinner surface of the wall and the cover open; 7 opposing surface of the arm 10 abut so as Fig. 2 is a detail view on the line-22 of, to hold the end 20 within the aperture 26. Fig. 1; y i The crank is, therefore, securely mounted and furthermore does not have an externally protruding end with the accompanyingdisadvantages.

Not only is the crank secure from being 'dislodged'by the bending ofthe side walls of the casing,'but it actsflas'albrace to limit both :theoutward bending and the inward" V bending of said walls, a feature of importance, particularly Where boxes are provided with U-shaped knock-outs, indicated'at28. In assembling the parts, the crank beginning with end is passed through the aper- The ,niember 16 has a slot which limits "the movement-of the crank in either direction. a

a willbeevidentqto those skilled in the. -art, my invention permits of rvariousnioditi cations without departing from the spirit thereof or the scope of theappended claims. 1 What I claim is l. In a safety switch, the combination of acasing having twoopposing side walls, one of said side walls hav ng an aperture, a

bracket secured to the linside of the other wall andhaving a perforatedportion spaced away therefrom, a crank having a bearing portion, in said aperture and an inwardly turned end in line with the-axis of said bearingqportiongand passing through the perforation {in said bracket the wall adjacent to said bracket engaging a portion of said crank and holding said turned end within the perforation of said bracket. i

2. In a safety switchithe combination of a casing having two opposing side walls, one

of -said sidewalls havlng an elongated aperture, a bracket secured tofthe insideof the other wall and having a. perforated por ion spaced'away therefrom, a crank having a" said bearing portion and passing through bearing portion in said aperture and an in wardly turned end n line with'the {1X13 of v the perforation in said bracket tl e wallad jacent tosa'd bracket engaging a portion of said crank and holding said turned end withinthe perforation of said bracket, and a inenibcr secured adjacent to said aperture holding said bearing portion fixed therein ag'ainst radial movement;

In a sait'etvswitclnytlie combination of a casin havingtwo opposing side walls, one

of saic sidewalls having airaperture, a

'bracket secured to the inside of the other wall and having a perforatedportion spaced away QtllGlGflOlll, a crank having a bearing portion in said aperture and an inwardly turned end in linewiththe axis of'said hearing portion and passing through the perforation in said. bracket, said crank having abail'portion whose sides are adjacent to the inner sidesof said walls so that the wall ad-fl jacent to said bracket engagesa portion of the perforation of said bracket.

May, 1926; r r p p o ERNEST G. JOHA NSSON.

said crank and holds said turned'end within In testimony whereof l have sgned? my name to this specificatiomthis 12th day'of 

